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193cac99f6
This stops parport from accessing nonexistent parallel ports. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* parport.h: platform-specific PC-style parport initialisation
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*
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* Copyright (C) 1999, 2000 Tim Waugh <tim@cyberelk.demon.co.uk>
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*
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* This file should only be included by drivers/parport/parport_pc.c.
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*/
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#ifndef _ASM_POWERPC_PARPORT_H
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#define _ASM_POWERPC_PARPORT_H
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#ifdef __KERNEL__
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#include <asm/prom.h>
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extern struct parport *parport_pc_probe_port (unsigned long int base,
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unsigned long int base_hi,
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int irq, int dma,
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struct pci_dev *dev);
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static int __devinit parport_pc_find_nonpci_ports (int autoirq, int autodma)
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{
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struct device_node *np;
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u32 *prop;
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u32 io1, io2;
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int propsize;
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int count = 0;
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for (np = NULL; (np = of_find_compatible_node(np,
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"parallel",
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"pnpPNP,400")) != NULL;) {
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prop = (u32 *)get_property(np, "reg", &propsize);
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if (!prop || propsize > 6*sizeof(u32))
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continue;
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io1 = prop[1]; io2 = prop[2];
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prop = (u32 *)get_property(np, "interrupts", NULL);
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if (!prop)
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continue;
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if (parport_pc_probe_port(io1, io2, prop[0], autodma, NULL) != NULL)
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count++;
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}
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return count;
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}
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#endif /* __KERNEL__ */
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#endif /* !(_ASM_POWERPC_PARPORT_H) */
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